I was just looking at some of the pay-packets on here http://www.mmahq.com/blog/2011/01/04...s-and-layoffs/ and started wondering how the UFC decided what they would pay their fighters.

Does anyone know if there is any definite criteria for how much people will get paid?

Is it amount of time they have been with the UFC? Or how much "pulling power" they have ? Or their win / loss rate ? Or down to good "manager/Agent negotiations?"